from the ceiling, 4.5" & 10.5" to the bottom of the speaker (with the grills on) and with the speaker at 90 degrees. that is using a QS4 speaker which i have a pair of them ceiling mounted. there won't be too much of a difference with the QS8's (i don't think) or about a difference of 2" which is the height difference.

Last edited by solarrdadd; 02/24/11 03:49 AM.
SonySXRD55"
Marantz AV7702MKII pre-amp
Emotiva XPA-5,UPA-2amps,
14 Speakers, All Axiom
Oppo 105D&93